include/net/if_inet6.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *      inet6 interface/address list definitions
   4  *      Linux INET6 implementation
   5  *
   6  *      Authors:
   7  *      Pedro Roque             <roque@di.fc.ul.pt>
   8  */
   9
  10 #ifndef _NET_IF_INET6_H
  11 #define _NET_IF_INET6_H
  12
  13 #include <net/snmp.h>
  14 #include <linux/ipv6.h>
  15 #include <linux/refcount.h>
  16
  17 /* inet6_dev.if_flags */
  18
  19 #define IF_RA_OTHERCONF 0x80
  20 #define IF_RA_MANAGED   0x40
  21 #define IF_RA_RCVD      0x20
  22 #define IF_RS_SENT      0x10
  23 #define IF_READY        0x80000000
  24
  25 /* prefix flags */
  26 #define IF_PREFIX_ONLINK        0x01
  27 #define IF_PREFIX_AUTOCONF      0x02
  28
  29 enum {
  30         INET6_IFADDR_STATE_PREDAD,
  31         INET6_IFADDR_STATE_DAD,
  32         INET6_IFADDR_STATE_POSTDAD,
  33         INET6_IFADDR_STATE_ERRDAD,
  34         INET6_IFADDR_STATE_DEAD,
  35 };
  36
  37 struct inet6_ifaddr {
  38         struct in6_addr         addr;
  39         __u32                   prefix_len;
  40         __u32                   rt_priority;
  41
  42         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
  43         __u32                   valid_lft;
  44         __u32                   prefered_lft;
  45         refcount_t              refcnt;
  46         spinlock_t              lock;
  47
  48         int                     state;
  49
  50         __u32                   flags;
  51         __u8                    dad_probes;
  52         __u8                    stable_privacy_retry;
  53
  54         __u16                   scope;
  55         __u64                   dad_nonce;
  56
  57         unsigned long           cstamp; /* created timestamp */
  58         unsigned long           tstamp; /* updated timestamp */
  59
  60         struct delayed_work     dad_work;
  61
  62         struct inet6_dev        *idev;
  63         struct fib6_info        *rt;
  64
  65         struct hlist_node       addr_lst;
  66         struct list_head        if_list;
  67
  68         struct list_head        tmp_list;
  69         struct inet6_ifaddr     *ifpub;
  70         int                     regen_count;
  71
  72         bool                    tokenized;
  73
  74         struct rcu_head         rcu;
  75         struct in6_addr         peer_addr;
  76 };
  77
  78 struct ip6_sf_socklist {
  79         unsigned int            sl_max;
  80         unsigned int            sl_count;
  81         struct in6_addr         sl_addr[0];
  82 };
  83
  84 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
  85         (count) * sizeof(struct in6_addr))
  86
  87 #define IP6_SFBLOCK     10      /* allocate this many at once */
  88
  89 struct ipv6_mc_socklist {
  90         struct in6_addr         addr;
  91         int                     ifindex;
  92         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  93         struct ipv6_mc_socklist __rcu *next;
  94         rwlock_t                sflock;
  95         struct ip6_sf_socklist  *sflist;
  96         struct rcu_head         rcu;
  97 };
  98
  99 struct ip6_sf_list {
 100         struct ip6_sf_list      *sf_next;
 101         struct in6_addr         sf_addr;
 102         unsigned long           sf_count[2];    /* include/exclude counts */
 103         unsigned char           sf_gsresp;      /* include in g & s response? */
 104         unsigned char           sf_oldin;       /* change state */
 105         unsigned char           sf_crcount;     /* retrans. left to send */
 106 };
 107
 108 #define MAF_TIMER_RUNNING       0x01
 109 #define MAF_LAST_REPORTER       0x02
 110 #define MAF_LOADED              0x04
 111 #define MAF_NOREPORT            0x08
 112 #define MAF_GSQUERY             0x10
 113
 114 struct ifmcaddr6 {
 115         struct in6_addr         mca_addr;
 116         struct inet6_dev        *idev;
 117         struct ifmcaddr6        *next;
 118         struct ip6_sf_list      *mca_sources;
 119         struct ip6_sf_list      *mca_tomb;
 120         unsigned int            mca_sfmode;
 121         unsigned char           mca_crcount;
 122         unsigned long           mca_sfcount[2];
 123         struct timer_list       mca_timer;
 124         unsigned int            mca_flags;
 125         int                     mca_users;
 126         refcount_t              mca_refcnt;
 127         spinlock_t              mca_lock;
 128         unsigned long           mca_cstamp;
 129         unsigned long           mca_tstamp;
 130 };
 131
 132 /* Anycast stuff */
 133
 134 struct ipv6_ac_socklist {
 135         struct in6_addr         acl_addr;
 136         int                     acl_ifindex;
 137         struct ipv6_ac_socklist *acl_next;
 138 };
 139
 140 struct ifacaddr6 {
 141         struct in6_addr         aca_addr;
 142         struct fib6_info        *aca_rt;
 143         struct ifacaddr6        *aca_next;
 144         struct hlist_node       aca_addr_lst;
 145         int                     aca_users;
 146         refcount_t              aca_refcnt;
 147         unsigned long           aca_cstamp;
 148         unsigned long           aca_tstamp;
 149         struct rcu_head         rcu;
 150 };
 151
 152 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 153 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 154 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 155
 156 struct ipv6_devstat {
 157         struct proc_dir_entry   *proc_dir_entry;
 158         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
 159         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
 160         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
 161 };
 162
 163 struct inet6_dev {
 164         struct net_device       *dev;
 165
 166         struct list_head        addr_list;
 167
 168         struct ifmcaddr6        *mc_list;
 169         struct ifmcaddr6        *mc_tomb;
 170         spinlock_t              mc_lock;
 171
 172         unsigned char           mc_qrv;         /* Query Robustness Variable */
 173         unsigned char           mc_gq_running;
 174         unsigned char           mc_ifc_count;
 175         unsigned char           mc_dad_count;
 176
 177         unsigned long           mc_v1_seen;     /* Max time we stay in MLDv1 mode */
 178         unsigned long           mc_qi;          /* Query Interval */
 179         unsigned long           mc_qri;         /* Query Response Interval */
 180         unsigned long           mc_maxdelay;
 181
 182         struct timer_list       mc_gq_timer;    /* general query timer */
 183         struct timer_list       mc_ifc_timer;   /* interface change timer */
 184         struct timer_list       mc_dad_timer;   /* dad complete mc timer */
 185
 186         struct ifacaddr6        *ac_list;
 187         rwlock_t                lock;
 188         refcount_t              refcnt;
 189         __u32                   if_flags;
 190         int                     dead;
 191
 192         u32                     desync_factor;
 193         u8                      rndid[8];
 194         struct list_head        tempaddr_list;
 195
 196         struct in6_addr         token;
 197
 198         struct neigh_parms      *nd_parms;
 199         struct ipv6_devconf     cnf;
 200         struct ipv6_devstat     stats;
 201
 202         struct timer_list       rs_timer;
 203         __s32                   rs_interval;    /* in jiffies */
 204         __u8                    rs_probes;
 205
 206         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 207         struct rcu_head         rcu;
 208 };
 209
 210 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
 211 {
 212         /*
 213          *      +-------+-------+-------+-------+-------+-------+
 214          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 215          *      +-------+-------+-------+-------+-------+-------+
 216          */
 217
 218         buf[0]= 0x33;
 219         buf[1]= 0x33;
 220
 221         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 222 }
 223
 224 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 225 {
 226         buf[0] = 0x00;
 227 }
 228
 229 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
 230                                   const unsigned char *broadcast, char *buf)
 231 {
 232         unsigned char scope = broadcast[5] & 0xF;
 233
 234         buf[0]  = 0;            /* Reserved */
 235         buf[1]  = 0xff;         /* Multicast QPN */
 236         buf[2]  = 0xff;
 237         buf[3]  = 0xff;
 238         buf[4]  = 0xff;
 239         buf[5]  = 0x10 | scope; /* scope from broadcast address */
 240         buf[6]  = 0x60;         /* IPv6 signature */
 241         buf[7]  = 0x1b;
 242         buf[8]  = broadcast[8]; /* P_Key */
 243         buf[9]  = broadcast[9];
 244         memcpy(buf + 10, addr->s6_addr + 6, 10);
 245 }
 246
 247 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
 248                                     const unsigned char *broadcast, char *buf)
 249 {
 250         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
 251                 memcpy(buf, broadcast, 4);
 252         } else {
 253                 /* v4mapped? */
 254                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
 255                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
 256                         return -EINVAL;
 257                 memcpy(buf, &addr->s6_addr32[3], 4);
 258         }
 259         return 0;
 260 }
 261
 262 #endif